.btn{
    border-radius: 5px;
}
.btn-sm{
    padding: 2px 1%;
}
.btn-md{
    padding: 2%;
    line-height: 1.1em;
    font-size: 1em;
}
.btn-lg{
    margin-top: 5px;
    padding: 2% 4%;
    line-height: 1.3em;
    font-size: 1.2em;
}
.btn:disabled,.btn:disabled:hover{
    border: rgb(247, 43, 43);
    background: rgb(247, 156, 171);
}
.btn-blue,.btn-blue:focus{
    background: rgb(209, 209, 248);
    border: none;
}
.btn-blue:hover{
    background: rgb(193, 193, 255);
    border: none;
}
.btn-blue:active{
    background: rgb(178, 178, 253);
    border: none;
}
.btn-white,.btn-white:focus{
    background: rgba(233, 235, 226,0.8);
    border: none;
}
.btn-white:hover{
    background: rgba(209, 212, 195, 0.8);
    border: none;
}
.btn-white:active{
    background: rgba(195, 199, 175, 0.8);
    border: none;
}
.btn-lightblue,.btn-lightblue:focus{
    background: rgba(218, 236, 250, 0.8);
    border: none;
}
.btn-lightblue:hover{
    background: rgba(188, 220, 247, 0.8);
    border: none;
}
.btn-lightblue:active{
    background: rgba(180, 219, 250, 0.8);
    border: none;
}
.btn-space{
    margin: 5px;
}
.ctrl,.ctrl:link,.ctrl:visited{
    color: rgb(95, 95, 247);
    font-weight: bold;
    text-decoration: none;
}
.ctrl:hover{
    color: rgb(9, 9, 247);
}

/*两边留空*/
html,
body {
    padding: 0 5%;
}
/*headrer标题*/
header {
    margin: 0 auto;
    text-align: center;
    font-size: 2.2em;
    font-weight: bold;
    line-height: 2.2em;
}
.little-title {
    line-height: 0.5em;
    font-weight: bold;
}
.pane{
    border: 1px solid black;
    box-sizing: border-box;
    min-height: 180px;
    padding: 5%;
    border-radius: 5px;
}
#vote-pane > *{
    line-height: 2em;
}

.center-pane{
    text-align: center;
}

.renew-img{
    width: 1rem;
    height: 1rem;
}

.renew-img:hover{
    animation: rotate 2s 2;
}

@keyframes rotate{
    from{
        transform: rotate(0deg);
    }
    to{
        transform: rotate(360deg);
    }
}